Effectiveness Evaluation Study of Self-made Zinc Alloy Sacrificial Anode under Chloride Salt Erosion Environment  

作　　者：南雪丽 JI Jianrui LI Rongyang CHEN Hao WANG Yi TANG Weibin NAN Xueli;JI Jianrui;LI Rongyang;CHEN Hao;WANG Yi;TANG Weibin(School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China;State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China;Gansu Province Transportation Planning,Survey&Design Institute Co.,Ltd.,Lanzhou 730000,China)

机构地区：[1]School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China [2]State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China [3]Gansu Province Transportation Planning,Survey&Design Institute Co.,Ltd.,Lanzhou 730000,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2023年第1期222-230,共9页武汉理工大学学报（材料科学英文版）

基　　金：Funded by Gansu Provincial Department of Transport Scientific Research Project(Nos.2017-16,2017-19);Science and Technology Program of Gansu Provincial Department of Housing and Construction(No.JK2021-11);Science and Technology Project of Gansu Provincial Department of Transportation(No.202102);Natural Science Foundation of Gansu Province(No.20JR10RA170);Gansu Provincial Department of Transportation 2021 the First Batch of the Unveiling of the Hanging System Projects。

摘　　要：To investigate the effectiveness of self-made zinc alloy sacrificial anode material for the protection of reinforcement in concrete under chlorine salt erosion environment,salt solution immersion corrosion and electromigration accelerated corrosion tests were used to evaluate the effectiveness of self-made zinc alloy anode with the help of relevant cathodic protection guidelines and evaluation criteria for the corrosion of reinforcement in concrete.The results showed that the protection was effective because the potential of the zinc alloy anode protection steel bar in the salt solution satis?ed the“-780 mV(SCE)”validity criterion.The self-corrosion potential(E_(corr))of the sacri?cial anode protection steel in concrete was greater than-276 mV,and the protective current density of the zinc alloy anode was 1-3μA·cm^(-2),which met the standards of EN12696-2000,further indicating that the self-made zinc alloy sacri?cial anode had a good protection combining with the polarization resistance and the appearance of the corroded surface of the steel in concrete.The microscopic morphology of the corroded surface and the composition of the corrosion products indicates that the mortar of the self-made zinc alloy anode has a lower pH than the imported anodes,so the long-term protection of the selfmade zinc alloy sacri?cial anode needs to be further improved.

关 键 词：zinc alloy anode cathodic protection steel corrosion CONCRETE polarization curve 

分 类 号：TG146.21[一般工业技术—材料科学与工程]